We enter a narrative frame in which Past Harry describes further-in-the-past events. In the frame, the Dursleys and Harry are exiting a hospital on a bright sunny day; Harry has bandages on zir face where the mouth scar is, and Dudley is snickering behind Harry's back.

PAST HARRY: The doctors had just fixed me up. But I was scarred. And Dudley was still...

We see close-up images of Harry's eyes as Harry's face twists with anger. Harry's eyes glow. Lightning flashes, stormclouds move in, and a heavy rain begins. As Vernon and Dudley are crossing at a sidewalk, a car slips on the wet road and hits Dudley. Harry grins as Vernon and Petunia rush to where Dudley lies on the ground. The driver of the car has also stopped and gotten out, and is shocked. The next thing we see is Vernon, Petunia, and Dudley exiting the hospital again, with Dudley in a wheelchair.

Now you know why Dudley was in a wheelchair on page 16. (And for reference, Harry is recovering from the injury we saw on page 31.)

During this flashback, Harry still believes the Dursleys' lie that zir parents died in a car crash. I wonder what that implies...

By the way, I consider the Luna font a success, and I'm making Slytherin, Gryffindor, and Granger fonts now. (For the moment, that'll only affect Draco, but a bunch of other minor characters speak in the Gryffindor and Slytherin fonts.)